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相关概念视频

Thermal and Photochemical Electrocyclic Reactions: Overview01:26

Thermal and Photochemical Electrocyclic Reactions: Overview

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Electrocyclic reactions are reversible reactions. They involve an intramolecular cyclization or ring-opening of a conjugated polyene. Shown below are two examples of electrocyclic reactions. In the first reaction, the formation of the cyclic product is favored. In contrast, in the second reaction, ring-opening is favored due to the high ring strain associated with cyclobutene formation.
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相关实验视频

Updated: Apr 1, 2026

An Electrochemical Cholesteric Liquid Crystalline Device for Quick and Low-Voltage Color Modulation
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An Electrochemical Cholesteric Liquid Crystalline Device for Quick and Low-Voltage Color Modulation

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一个电色可变分子开关

Junling Sun1, Yilei Wu1, Yuping Wang1

  • 1Department of Chemistry, Northwestern University , 2145 Sheridan Road, Evanston, Illinois 60208, United States.

Journal of the American Chemical Society
|October 7, 2015
PubMed
概括
此摘要是机器生成的。

这项研究提出了一种新型的三稳 [2]catenane,具有三个识别点. 它的机械和颜色特性可以通过氧化还原潜力调整,这对光电设备具有前景.

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High-Contrast and Fast Photorheological Switching of a Twist-Bend Nematic Liquid Crystal
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Electric-field Control of Electronic States in WS2 Nanodevices by Electrolyte Gating
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Electric-field Control of Electronic States in WS2 Nanodevices by Electrolyte Gating
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科学领域:

  • 超分子化学
  • 材料科学
  • 电化学

背景情况:

  • 这些分子具有独特的特性.
  • 控制分子运动和颜色变化对于先进的材料来说至关重要.

研究的目的:

  • 合成一种新型的三稳 [2]catenane.
  • 为了证明可调节的分子运动和电染色.

主要方法:

  • 通过捐赠者-接受者模板和"线程后循环"方法进行合成.
  • 使用氧化还原潜力控制环基的运动 (CBPQT4+).

主要成果:

  • [2]catenane具有三种不同的识别位点:1,5-二氧纳 (DNP),四法 (TTF) 和4,4-双 (BIPY(•+)).
  • CBPQT ((4+) 环的氧诱导运动导致明显的颜色变化:绿色 (环绕TTF),红色 (环绕DNP) 和紫色 (环绕BIPY ((•+)).

结论:

  • 合成的 [2]catenane 具有可控制的多态电色.
  • 它的可切换性使其成为电光器件应用的有希望的候选者.